하이브리드섬유보강 프리캐스트 콘크리트의 보강섬유 종류에 따른 역학적 특성 및 충격저항성
Mechanical Properties and Impact Resistance of Hybrid Fiber Reinforced Concrete with Type of Reinforcing Fibers for Precast Concrete
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초록
The objective of the current study is to evaluate the effects depending on the types of reinforcing fibers being influential in viewof mechanical properties and impact resistance of hybrid fiber reinforced concrete (HFRC) for applications to precast concrete structure. Hybrid fibers applied therefor were three types such as PP/MSF (polypropylene fiber＋macro synthetic fiber), PVA/MAF (polyvinylalcohol fiber＋MSF) and JUTE/MSF (natural jute fiber＋MSF), where the volume fraction of PP, PVA and natural jute was appliedwith 0.2 %, respectively, while based on 0.05 % volume fraction of MSF. The HFRC was tested for slump, compressive strength,flexural strength and impact resistance. The test result demonstrated that mixture of such hybrid fibers improve compressive strength,flexural strength and impact resistance of concrete. Moreover, it was found that HFRCs to which hydrophilic fibers, i.e. PVA/MSF andJUTE/MSF, were mixed show more improved features that HFRC to which non-hydrophilic fiber, i.e. PP/MSF was mixed. Meanwhile,the finding that PVA/MSF HFRC exhibited better performance than JUTE/MSF HFRC was attributed from the former having higheraspect ratio than that of the latter.
Abstract
The objective of the current study is to evaluate the effects depending on the types of reinforcing fibers being influential in viewof mechanical properties and impact resistance of hybrid fiber reinforced concrete (HFRC) for applications to precast concrete structure. Hybrid fibers applied therefor were three types such as PP/MSF (polypropylene fiber＋macro synthetic fiber), PVA/MAF (polyvinylalcohol fiber＋MSF) and JUTE/MSF (natural jute fiber＋MSF), where the volume fraction of PP, PVA and natural jute was appliedwith 0.2 %, respectively, while based on 0.05 % volume fraction of MSF. The HFRC was tested for slump, compressive strength,flexural strength and impact resistance. The test result demonstrated that mixture of such hybrid fibers improve compressive strength,flexural strength and impact resistance of concrete. Moreover, it was found that HFRCs to which hydrophilic fibers, i.e. PVA/MSF andJUTE/MSF, were mixed show more improved features that HFRC to which non-hydrophilic fiber, i.e. PP/MSF was mixed. Meanwhile,the finding that PVA/MSF HFRC exhibited better performance than JUTE/MSF HFRC was attributed from the former having higheraspect ratio than that of the latter.
참고문헌 (20)
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